Honda Accord 2008 Manual page 898

07/11/02 08:46:48 61TA0000_140_0055
Hydraulic Flow
Distribution of Hydraulic Pressure
As the engine turns, the ATF pump starts to operate. Automatic transmission fluid (ATF) is drawn through the ATF
strainer (filter) and discharged into the hydraulic circuit. Then, ATF flowing from the ATF pump becomes line pressure
that is regulated by the regulator valve. Torque converter pressure from the regulator valve enters the torque
converter through the lock-up shift valve, and it is discharged from the torque converter. The torque converter check
valve prevents torque converter pressure from rising.
The PCM turns the shift solenoid valves ON and OFF. The shift solenoid valve intercepts line pressure from the ATF
pump via the manual valve when the shift solenoid valve is OFF. When the shift solenoid valve is turned ON by the
PCM, line pressure changes to shift solenoid valve pressure at the shift solenoid valve, then the shift solenoid valve
pressure flows to the shift valve. Applying shift solenoid pressure to the shift valves moves the position of the shift
valve, and switches the port of the hydraulic circuit. The PCM also controls A/T clutch pressure control solenoid valves
A, B, and C. The A/T clutch pressure control solenoid valves regulate hydraulic pressure, and applies the pressure to
the clutches to engage smoothly. The clutches receive optimum clutch pressure which is regulated by the A/T clutch
pressure control solenoid valves for comfortable driving and shifting under all conditions.
Hydraulic pressure at the port for use in the hydraulic circuit
Port
No.
1 Line
3 Line
3' Line
4 Line
4' Line
4'' Line
7 Line
1A Line or A/T clutch pressure control solenoid
valve A
1B Line
3A Line
3B Line
3C Line
5A Line
5B Line
5C Line
5D Line
5E Line or A/T clutch pressure control solenoid
valve B
5F Line or A/T clutch pressure control solenoid
valve A or B
5G A/T clutch pressure control solenoid valve B
5H A/T clutch pressure control solenoid valve C
5J A/T clutch pressure control solenoid valve C
5K A/T clutch pressure control solenoid valve C
5L A/T clutch pressure control solenoid valve C
5N A/T clutch pressure control solenoid valve C
SA Shift solenoid valve A
ＴＡ０８ＡＥＢＥ１０４１０８０００００ＣＡＡＴ０５
Hydraulic Pressure Port Hydraulic Pressure
No.
SB Shift solenoid valve B
SC Shift solenoid valve C
SD Shift solenoid valve D
SE Shift solenoid valve E
10 1st clutch
20 2nd clutch
30 3rd clutch
40 4th clutch
50 5th clutch
55 A/T clutch pressure control solenoid valve A
55' A/T clutch pressure control solenoid valve A
56 A/T clutch pressure control solenoid valve B
57 A/T clutch pressure control solenoid valve C
90 Torque converter
91 Torque converter
92 Torque converter
93 ATF cooler
94 Torque converter
95 Lubrication
96 Torque converter
97 Torque converter
99 Suction
X Drain
HX High position drain
AX Air drain
(cont'd)
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